Consider an Alder Lake-N N95/ N100 mini-PC with four 2.5GBASE-T ports instead, supported right now and in the ~130-250 EUR range (complete, with SSD, RAM, case, PSU, everything, ready to deploy). Fast, easy and 'boring' (in the good sense).
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I do recommend against mixing containers and routers, stick to the bare iron for that, from a security point of view alone.